A receiver (6) is disclosed for wirelessly receiving power from a transmitter. The receiver comprises a resonant receiver circuit having a plurality of coils (200a)-(200d) operatively coupled to a combining circuit (202). Each coil, with the combining circuit, is arranged to receive power via resonant inductive coupling. The combining circuit is arranged to combine power received from the plurality of coils for provision to an electric load. Other embodiments provide a capsule for ingestion by a patient, the capsule comprising the receiver.

An example method is provided for detecting and classifying foreign objects, performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method includes obtaining a plurality of electrical measurements while a wireless-power-transmitting antenna is transmitting different power beacons. The method also includes forming a feature vector according to the plurality of electrical measurements. The method further includes detecting a presence of one or more foreign objects prior to transmitting wireless power to one or more wireless power receivers by inputting the feature vector to trained one or more classifiers, wherein each classifier is a machine-learning model trained to detect foreign objects distinct from the one or more wireless power receivers.

A wireless connector includes: a first unit attached detachably from the outside of a first object; and a second unit attached detachably from the outside of a second object. The first unit includes a first housing to which a first transmission/reception part and a first connector part are secured, the first connector part being attached to the first object and transmitting a to-be-transmitted target between the first connector part and the first object. The second unit includes a second housing to which a second transmission/reception part and a second connector part are secured, the second connector part being attached to the second object and transmitting a to-be-transmitted target between the second connector part and the second object. The first transmission/reception part and the second transmission/reception part are arranged so as to be separated from each other and opposed to each other to wirelessly transmit the to-be-transmitted target.

A wiring device includes a line input terminal configured to couple to a source of alternating current (AC) power and a charging circuit having an induction coil to propagate a magnetic charging field to emanate from the wiring device. The wiring device can be provided individually or in a kit with a wall plate configured for covering the wiring device. Magnet(s) can be provided proximate a front face of a housing of the wiring device, and/or included in/on a wall plate, to magnetically attract an electronic device when the electronic device is positioned proximate the front face. Such wall plates can be provided individually without a wiring device. Additionally or alternatively, a wall plate with or without magnets can include a shelf protruding from a bottom portion thereof, the shelf configured to support an electronic device in position of a front face of a housing of a wiring device.

Systems, methods and apparatus for wireless charging are disclosed. A wireless charging device has a resonant circuit including one or more power transmitting coils in a charging surface of the charging device, a driver circuit configured to provide a charging current to the resonant circuit, and a controller. The controller is configured to determine an average transmitted power using samples of current and voltage captured from the resonant circuit, and determine that a foreign object is located on or near the charging surface when the average transmitted power exceeds a measurement of received power provided by a receiving device and parasitic losses associated with the wireless charging device. In one example, each sample of current is obtained by measuring a current flowing in the resonant circuit, and each of sample of voltage is obtained by measuring a voltage across the one or more power transmitting coils.

A metasurface for wireless power transfer includes an insulated support structure. A plurality of magnetically coupled resonators are insulated and supported by the insulated support structure. The plurality of coupled resonators are configured and arranged to couple within and shape a magnetic near field distribution from a transmitter into a target distribution toward a target receiver. The plurality of coupled resonators form a non-uniform impedance distribution pattern to provide the shape of the target distribution. The insulated support structure can be thin and flexible, allowing it to be worn by a person, for example to transfer power to an implanted device.

A method of wirelessly transmitting power includes: causing a power transmission circuit to transmit, to a master power reception circuit, a portion of power it is capable of transmitting; adjusting operation of a slave power reception unit until a first rectified voltage produced by the master power reception circuit and a second rectified voltage produced by the slave power reception unit are equal; causing the power transmission circuit to transmit additional power to the slave power reception unit, resulting in the first and second rectified voltages being unequal; and adjusting operation of the slave power reception unit until the first and second rectified voltages are again equal. A dummy load is connected to the slave power reception unit prior to causing the power transmission circuit to transmit the additional power, and is disconnected once the first and second rectified voltages are equal.

Systems, methods and apparatus for wireless charging are disclosed. A method for receiving power from a charging surface includes obtaining a combined current by combining currents induced in a plurality of receiving coils provided on a surface of the chargeable device in a first mode of operation, rectifying the combined current to obtain a battery charging current, and providing the battery charging current to a battery coupled to the chargeable device. In one example, the currents are induced through electromagnetic coupling by coils in a charging surface of a wireless charging device.

Disclosed is a method for controlling an electronic device electrically couplable to an external electronic device through a connector and capable of transmitting/receiving wireless power, the method including: an operation of identifying electrical connection to the external electronic device; an operation of receiving power from the external electronic device through a short-range communication module; an operation of controlling a mode switch module based on the received power and transmitting a signal regarding a power transmission mode to the external electronic device through the connector; an operation of receiving direct-current power from the external electronic device through the connector after transmitting the signal regarding the power transmission mode; and an operation of generating an electromagnetic field for wireless power transmission through the wireless power transmission/reception module, based on the received direct-current power.

An electronic device is disclosed. The electronic device discloses a plurality of wireless charging antennas, a plurality of shielding partition layers, at least some of the plurality of shielding partition layers disposed between the plurality of wireless charging antennas, a plurality of external device-receiving grooves formed through spaces defined between pairs of the shielding partition layers, and a processor electrically coupled to the plurality of wireless charging antennas. The processor is configured to: determine whether at least one external device is inserted into at least one of the plurality of external device-receiving grooves, and when the at least one external device is inserted into the at least one of the plurality of external device-receiving grooves, wirelessly transmit power through at least one wireless charging antenna corresponding to the at least one of the plurality of external device-receiving grooves into which the at least one external device is inserted.